箕宿二
觀測資料 曆元 J2000.0 | |
---|---|
星座 | 人馬座 |
星官 | 箕 (箕宿) |
赤經 | 18h 20m 59.64354s[1] |
赤緯 | −29° 49′ 41.1659″[1] |
視星等(V) | +2.70[2] |
特性 | |
光谱分类 | K3 III[3] |
U−B 色指数 | +1.55[2] |
B−V 色指数 | +1.38[2] |
天体测定 | |
徑向速度 (Rv) | –19.9[4] km/s |
自行 (μ) | 赤经:+32.54[1] mas/yr 赤纬:−25.57[1] mas/yr |
视差 (π) | 9.38 ± 0.18[1] mas |
距离 | 348 ± 7 ly (107 ± 2 pc) |
绝对星等 (MV) | −1.99[5] |
詳細資料 | |
其他命名 | |
這是一顆巨星,其光譜類型是K3 III。
它有三顆黯淡的伴星[7]:
- 箕宿二B,视星等14等,离主星(箕宿二A)26角秒;
- 箕宿二C,视星等15等,离主星40角秒;
- 箕宿二D,视星等13等,离主星58角秒;
目前尚不知道这四颗恒星之间是否有物理联系或只是刚好在相同的方向上。
名稱和語源
相關條目
- 科幻中的箕宿二
參考資料
- van Leeuwen, F., , Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357
- Johnson, H. L.; et al, , Communications of the Lunar and Planetary Laboratory, 1966, 4 (99): 99, Bibcode:1966CoLPL...4...99J
- Houk, Nancy, , Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0 (Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan), 1979, 3, Bibcode:1982mcts.book.....H
- Evans, D. S., Batten, Alan Henry; Heard, John Frederick , 编, , Determination of Radial Velocities and their Applications (University of Toronto: International Astronomical Union), June 20–24, 1966, 30: 57 [2009-09-10], Bibcode:1967IAUS...30...57E, (原始内容存档于2019-06-26)
|booktitle=
被忽略 (帮助) - Elgarøy, Øystein; Engvold, Oddbjørn; Lund, Niels, , Astronomy and Astrophysics, March 1999, 343: 222–228, Bibcode:1999A&A...343..222E
- , SIMBAD (Centre de Données astronomiques de Strasbourg), [2012-01-11], (原始内容存档于2019-12-16)
- Dommanget, J.; Nys, O. . Com. de l'Observ. Royal de Belgique. 1994, 115: 1. Bibcode:1994CoORB.115....1D.
- . deepsky.astroinfo.org. [30 August 2008]. (原始内容存档于2016-09-21).
- skywatchers 的存檔,存档日期2007-05-17.
- Allen, R. H. Reprint. New York: Dover Publications Inc. 1963: 355 [2012-09-04]. ISBN 0-486-21079-0. (原始内容存档于2023-03-05).
- Knobel, E. B. . Monthly Notices of the Royal Astronomical Society. June 1895, 55 (8): 435. Bibcode:1895MNRAS..55..429K. doi:10.1093/mnras/55.8.429.
外部連結
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